const path = require('path');
const HTMLPlugin=require('html-webpack-plugin')
// const {VueLoaderPlugin} = require('vue-loader');
const webpack = require('webpack');
const ExtractPlugin = require('extract-text-webpack-plugin');


const isDev = process.env.NODE_ENV === 'development';


const config = {
    //目标
    target: "web",
    //入口
    entry: path.join(__dirname, 'src/index.js'),
    output: {
        filename: "bundle.[hash:8].js",
        path: path.join(__dirname, 'dist')
    },
    module: {
        rules: [
            {
                test: /.vue$/,
                loader: 'vue-loader'
            },
            {
                test: /.jsx$/,
                loader: 'babel-loader'
            },
            {
                test: /\.(gif|jpg|jpeg|svg)/,
                use: [
                    {
                        loader: "url-loader",
                        options: {
                            limit: 1024,
                            name: '[name]-aaa.[ext]'
                        }
                    }
                ]
            },
        ]
    },
    plugins: [
        new webpack.DefinePlugin({
            'process.env':{
                NODE_ENV:isDev?'"development"':'"production"'
            }
        }),
        // new VueLoaderPlugin(),
        new HTMLPlugin(),
    ]
};

if (isDev) {
    config.module.rules.push(
        {
            test: /\.styl/,
            use: [
                'style-loader',
                'css-loader',
                {
                    loader: "postcss-loader",
                    options: {
                        sourceMap:true,
                    }
                },
                'stylus-loader'
            ]
        })
    config.devtool = '#cheap-module-eval-source-map';
    console.log("development===========================:"+isDev)
    config.devServer={
        port: 8000,
        host: '0.0.0.0',//监听地址
        overlay:{
            errors:true,
        },
        hot:true
    }
    config.plugins.push(
        new webpack.HotModuleReplacementPlugin(),
        new webpack.NoEmitOnErrorsPlugin()
    )
}else{
    config.entry = {
        app: path.join(__dirname, 'src/index.js'),
        vendor:['vue']
    };
    config.output.filename = '[name].[chunkhash:8].js';
    config.module.rules.push(
        {
            test: /\.styl/,
            use: ExtractPlugin.extract({
                fallback: 'style-loader',
                use: [
                    'css-loader',
                    {
                        loader: "postcss-loader",
                        options: {
                            sourceMap: true,
                        }
                    },
                    'stylus-loader'
                ]
            })
        }
    );
    config.plugins.push(
        new ExtractPlugin('styles.[contentHash:8].css'),
        new webpack.optimize.CommonsChunkPlugin({
            name:"vendor"
        }),
        new webpack.optimize.CommonsChunkPlugin({
            name:'runtime'
        })
    );
}

module.exports = config;